Hierarchy/Derived subclasses
312 / 294 | -> 330.1 | -> 334.1 | -> 334.7 | -> 334.16 | -> 334.18 | -> 334.19 |
-> 334.21 |
uspto searches
Patent Apps in 312/334.18Granted Patents in 312/334.18
Use the links above or do an advanced search in ppubs for:
(312/334.18.ccls. or 312/334.19.ccls. or 312/334.21.ccls.)
This will show what classes derive from the input. Ex: entering 43/42.24 shows the derived classes and the search that can be used to find patents or patent applications in those subclasses.